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Dual Effects of miR156-Targeted SPL Genes and CYP78A5/KLUH on Plastochron Length and Organ Size in Arabidopsis thaliana
Open accessAbstract
Leaves of flowering plants are produced from the shoot apical meristem at regular intervals, with the time that elapses between the formation of two successive leaf primordia defining the plastochron. We have identified two genetic axes affecting plastochron length in Arabidopsis thaliana. One involves microRNA156 (miR156), which targets a series of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) genes. In situ hybridization studies and misexpression experiments demonstrate that miR156 is a quantitative, rather than spatial, modulator of SPL expression in leaf primordia and that SPL activity nonautonomously inhibits initiation of new leaves at the shoot apical meristem. The second axis is exemplified by a redundantly acting pair of cytochrome P450 genes, CYP78A5/KLUH and CYP78A7, which are likely orthologs of PLASTOCHRON1 of rice (Oryza sativa). Inactivation of CYP78A5, which is expressed at the periphery of the shoot apical meristem, accelerates the leaf initiation rate, whereas cyp78a5 cyp78a7 double mutants often die as embryos with supernumerary cotyledon primordia. The effects of both miR156-targeted SPL genes and CYP78A5 on organ size are correlated with changes in plastochron length, suggesting a potential compensatory mechanism that links the rate at which leaves are produced to final leaf size.
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Cites
Regulation of phyllotaxis by polar auxin transport
Reinhardt, D., Pesce, E.-R., Stieger, P., Mandel, T., Baltensperger, K., Bennett, M., Traas, J., Friml, J., & Kuhlemeier, C. (2003) · Nature · doi:10.1038/nature02081 · Cited by 1,523
Specific effects of microRNAs on the plant transcriptome
Schwab, R., Palatnik, J. F., Riester, M., Schommer, C., Schmid, M., & Weigel, D. (2005) · Developmental Cell · doi:10.1016/j.devcel.2005.01.018 · Cited by 1,467
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Cited by
Regulation of OsSPL14 by OsmiR156 defines ideal plant architecture in rice
Jiao, Y., Wang, Y., Xue, D., Wang, J., Yan, M., Liu, G., Dong, G., Zeng, D., Lu, Z., Zhu, X., et al. (2010) · Nature Genetics · doi:10.1038/ng.591 · Cited by 1,528
Self-citationOsSPL14 promotes panicle branching and higher grain productivity in rice
Miura, K., Ikeda, M., Matsubara, A., Song, X.-J., Ito, M., Asano, K., Matsuoka, M., Kitano, H., & Ashikari, M. (2010) · Nature Genetics · doi:10.1038/ng.592 · Cited by 1,104
Gou, J.-Y., Felippes, F. F., Liu, C.-J., Weigel, D., & Wang, J.-W. (2011) · The Plant Cell · doi:10.1105/tpc.111.084525 · Cited by 953
Self-citationThe control of developmental phase transitions in plants
Huijser, P., & Schmid, M. (2011) · Development · doi:10.1242/dev.063511 · Cited by 673
Xu, M., Hu, T., Zhao, J., Park, M.-Y., Earley, K. W., Wu, G., Yang, L., & Poethig, R. S. (2016) · PLOS Genetics · doi:10.1371/journal.pgen.1006263 · Cited by 586
Metadata
- Authors
- Wang, J.-W., Schwab, R., Czech, B., Mica, E., & Weigel, D.
- Venue
- The Plant Cell
- Publisher
- Oxford University Press (OUP)
- Published
- 2008-05-01
- Volume
- 20
- Issue
- 5
- Pages
- 1231-1243
- ISSN
- 1040-4651 (ISSN-L)
- 1532-298X
- OpenAlex
- W2097820884
- Cited by
- 513
- References
- 2
- FWCI
- 32.78
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Wang, J.-W., Schwab, R., Czech, B., Mica, E., & Weigel, D. (2008). Dual Effects of miR156-Targeted SPL Genes and CYP78A5/KLUH on Plastochron Length and Organ Size in Arabidopsis thaliana. The Plant Cell. https://doi.org/10.1105/tpc.108.058180
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